SQL Tutorial > SQL SUB QUERIES

SQL Correlated Subqueries Part 3

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A correlated subquery refers to a column of a table that is not in the FROM clause of the query. The column can appear in both the Projection and the WHERE clauses. Correlated subqueries, in general, degrade performance.

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very useful

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mohd aamir
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Hi Team, Why you didn't teach/learn how to write select query, even you shared 15 question for practice :(

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